Acid-resisting alloy



UNITED STATES PATENT OFFICE.

ALVAH W. CLEMENT, OF CLEVELAND, OI- IIO, ASSIGNOR TO THE CLEVELAND BRASS MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ACID-RESISTING ALLOY.

No Drawing.

To all whom it may concern:

Be it known that I, ALvAH IV. CLEMENT,

a citizen of the United States, residing at Cleveland, in the county of Cuyah'oga and State of Ohio, have invented a certain new and useful Improvement in Acid-Resisting Alloys, (13,) of which the following is a full, clear, and exact description.

This invention relates to metal alloys, and seeks to provide an alloy of metals, which alloy shall be highly resistant to acid,tpar- 'ticularly nitric acid, even though the acid of carbon, substantially 2 to 4 per cent. of-

silicon, and the remainder of iron.

The carbon 1n this alloy exists mainly in Its uncomblned or graphltlc form.

In the preparation and fusingof the conr- Specification of Letters Patent. Patented Apr, 26 1921,

Application filed July 26, 1917. Serial No. 182,911.

used-in order to render the alloy more fluid than it otherwise would be. thus making it easier to handle. The silicon also has the property of causing the, carbon which may be contained in the fused chromium and iron to assume the form of graphitic carbon when the alloy is finally cooled. The amount of silicon thus used will vary up to substantially 4J-per cent.

The alloy must be practically free of manganese or other elements which tend to counteract the action of silicon.

The alloy-thus formed will be highly resistant to nitric acid, hot or cold, concentrated or dilute.

' Having thus described myinvention, what I claim is: 1

An acid resisting alloy consisting of substantially 60 per cent. chromium, substantially 2 to 4 per cent. silicon, substantially 2 to 5 per cent. carbon existing in the alloy as graphiticcarbon, and the remainder of .1ron.

In testimony whereof, I hereuntoaflirr my signature.

,ALVAH W. CLEMENT.

- ponent parts of the alloy, silicon may be 

